Abstract:
The machine comprises at least a printing cylinder (4), an inking cylinder (5) and a chain gripper transporting system (2,3) with grippers (17). The printing cylinder (4) comprises at least one transversal pit (7) for receiving said chain gripper system (3) such that the inking cylinder (5) inks the planar object (1) while said object (1) is held by said chain gripper system (3).
Abstract:
The system for an intaglio printing machine comprises at least a duct (1) for inking the surface of an engraved selective inking cylinder (5) which in turn inks the surface of a plate cylinder (16) of the intaglio printing machine via a chablon roller (17) having reliefs (18) corresponding to engravings (27) to be inked on said plate cylinder (16). Said inking system further comprises a wiping system (8) for wiping the surface of said selective inking cylinder and recuperating the wiped ink in the duct (1).
Abstract:
Vorrichtung (01) und Verfahren zum Reinigen eines Zylinders (02) oder einer Walze (02) einer Druckmaschine mit einer Reinigungsmittelbahn (03), wobei für die Reinigungsmittelbahn (03) eine erste Vorratsrolle (04) und eine zweite Vorratsrolle (07) vorgesehen ist, und wobei eine Spuleinrichtung (06) zum abschnittsweisen Vorschub der Reinigungsmittelbahn (03) drehbeweglich antreibbar ist. Der Radius mindestens einer Vorratsrolle (04, 07) wird mit einer Messeinrichtung (19,21) erfasst und der Betrag der Drehbewegung der Spuleinrichtung (06) beim abschnittsweisen Vorschub der Reinigungsmittelbahn (03) in Abhängigkeit des Radius der Vorratsrolle (04,07) verändert.
Abstract:
Siebdruckzylinder mit einem Rundsieb (03, 103) und einer an die Innenfläche des Rundsiebs (03, 103) angestellten Rakel (01, 101); an der, der vor die Rakel geförderten Farbe zugewandten seitlichen Fläche (05, 105) der Rakel (01, 101) ist ein zur Zylinderachse paralleler Steg (07, 107) angeordnet, wobei die Rakel (01, 101), ein von ihr berührter Abschnitt des Rundsiebs (03, 103) und der von der Rakel (01, 101) ausgehende Steg (07, 107) eine entgegen der Drehrichtung des Siebdruckzylinders offene Kanalsohle bilden; wenigstens in den beiden Längsendbereichen des Steges (07, 107) sind Leitmittel, insbesondere Rillen (108), zum Ablenken von durch die Rakel (01, 101) von dem Rundsieb (03, 103) abgestreifter Farbe in Längsrichtung der Rakel (01, 101) zu deren Mitte hin, angeordnet.
Abstract:
L'élément de sécurité comprend un fond (1) ayant des éléments géométriques juxtaposés (2 à 8) formés chacun d'un ensemble lignes, les lignes d'un élément géométrique ayant un angle différent de celui des lignes d'un élément voisin. Les lignes d'une partie des éléments géométriques sont imprimées avec une encre classique et les lignes d'une autre partie des éléments géométriques sont imprimées avec une encre ayant des caractéristiques métalliques.
Abstract:
The machine comprises at least a cutting tool (11) and a first cylinder (3) supporting said substrate (8) and driving said substrate with gripper means (5) around a first axis of rotation (6), a second cylinder (10) comprising the cutting tool (11) having the shape of said opening, said cutting cylinder (10) rotating around a second axis of rotation (12) parallel to the first axis of rotation. The second axis is mounted on lateral displacement means (22) to bring said second cylinder (10) in a cutting position with respect to the first cylinder (3). Evacuation means (15) are provided to evacuate the cut part (21) of the substrate (8).
Abstract:
There is described a method for applying foil material (200) onto successive sheets (S), especially sheets for the production of securities, such as banknotes. In a first step, individual sheets (S) are transported in succession along a sheet transport path. In a second step, at least one continuous band of foil material (200) is applied onto the individual sheets (S) along a direction substantially parallel to a direction of displacement (A) of the individual sheets, thereby forming a continuous flow of sheets linked to one another by the said at least one continuous band of foil material (200). In a third step, the said at least one continuous band of foil material (200) is cut by means of a laser beam (L) such that the continuous flow of sheets is again separated into individual sheets (S) with portions of foil material (200*) remaining on the sheet. The cutting is performed at positions located on the sheets (S) such that said portions of foil material (200*) remaining on the sheets do not extend beyond leading and trailing edges of the sheets (S). Waste portions (205) of said at least one continuous band of foil material (200) that are not to remain on the sheets (S) are seized prior to cutting by the laser beam (L) and are held throughout the cutting process. There is also described an installation for carrying out the above method.
Abstract:
There is described a method for manufacturing intaglio printing plates for the production of security papers, wherein a laser beam (2) is used to engrave intaglio printing patterns (3, 3.1, 3.2, 3.3) directly into the surface of a laser- engravable, especially metallic, printing plate medium (1 ), wherein laser engraving of the printing plate medium (1 ) is carried out layer by layer in several individual engraving steps performed one after the other in register so that the intaglio printing patterns (3, 3.1, 3.2, 3.3) are gradually engraved into the surface of the printing plate medium (1 ) up to desired engraving depths, the surface of the engraved printing plate medium (1 ) being cleaned from residues of the laser engraving process following and between each individual engraving step.
Abstract:
There is described a method for applying foil material (200) onto successive sheets (S), especially sheets of securities. In a first step, individual sheets (S) are transported in succession along a sheet transport path. In a second step, at least one continuous band of foil material (200) is applied onto the individual sheets (S) along a direction substantially parallel to a direction of displacement of the individual sheets, thereby forming a continuous flow of sheets linked to one another by the said at least one continuous band of foil material (200). In a third step, the said at least one continuous band of foil material (200) is cut by means of a laser beam such that the continuous flow of sheets is again separated into individual sheets (S) with portions of foil material (200*) remaining on the sheet. The cutting is performed at positions located on the sheets (S) such that said portions of foil material (200*) remaining on the sheets do not extend beyond leading and trailing edges of the sheets (S). Waste portions (205) of said at least one continuous band of foil material (200) that are not to remain on the sheets (S) are evacuated by aspiration, evacuation being carried out by direct aspiration of the waste portions (205) at least at a first position located downstream of and proximate to a cutting position where said at least one continuous band of foil material (200) is cut by the laser beam. There is also described an installation for carrying out the above method.
Abstract:
There is described a method for checking the authenticity of security documents, in particular banknotes, wherein authentic security documents comprise security features (41-49; 30; 10; 51, 52) printed, applied or otherwise provided on the security documents, which security features comprise characteristic visual features intrinsic to the processes used for producing the security documents. The method comprises the steps of (i) acquiring a sample image (c 0 ) of at least one region of interest (R.o.l.) of the surface of a candidate document to be authenticated, which region of interest encompasses at least part of the security features, (ii) digitally processing the sample image (c 0 ) by performing a decomposition of the sample image (c 0 ) into at least one scale sub-space containing high resolution details (d 1 1 , d 1 2 , d 1 3 ,...) of the sample image (c 0 ) and extracting classifying features (σ 2 , C,...) from the scale sub-space, and (iii) deriving an authenticity rating of the candidate document based on the extracted classifying features (σ 2 , C,...).